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- from alpinelinux
- http://git.alpinelinux.org/cgit/aports/tree/main/alsa-lib/alsa-lib-portable-mutex.patch
- --- alsa-lib-1.0.27.2.orig/src/conf.c 2013-07-08 14:31:36.000000000 +0200
- +++ alsa-lib-1.0.27.2/src/conf.c 2013-10-02 14:32:15.000000000 +0200
- @@ -427,8 +427,8 @@ beginning:</P>
- #ifndef DOC_HIDDEN
-
- #ifdef HAVE_LIBPTHREAD
- -static pthread_mutex_t snd_config_update_mutex =
- - PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
- +static pthread_mutex_t snd_config_update_mutex;
- +static pthread_once_t snd_config_update_mutex_once = PTHREAD_ONCE_INIT;
- #endif
-
- struct _snd_config {
- @@ -472,8 +472,19 @@ typedef struct {
-
- #ifdef HAVE_LIBPTHREAD
-
- +static void snd_config_init_mutex(void)
- +{
- + pthread_mutexattr_t attr;
- +
- + pthread_mutexattr_init(&attr);
- + pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
- + pthread_mutex_init(&snd_config_update_mutex, &attr);
- + pthread_mutexattr_destroy(&attr);
- +}
- +
- static inline void snd_config_lock(void)
- {
- + pthread_once(&snd_config_update_mutex_once, snd_config_init_mutex);
- pthread_mutex_lock(&snd_config_update_mutex);
- }
-
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